This Mercury Mariner 225 250 HP Alternator 821663A1 is a reliable and durable product that will meet your needs. It is manufactured in the United States and comes with no warranty, sold as is. This item is perfect for those who are looking for a replacement part for their boat or for those who are interested in Mercury brand products. The manufacturer part number is 821663A1 and it is a great addition to any boat parts collection.